Math sin/cos

On a piece of paper draw and label a right triangle using the given sides, solve for the unknown side and write the trigonometric functions for angles A and B, if a=5 and c=7.

I already found side b which equals 2 sqrts of 6.

Now I need to find the sin/cos of B



Cos B
If someone can tell me what values to put for sine and cosine I can do the rest. Thanks!

An easy way to remeber these rules is SOHCAHTOA. S is sine C is cosine and T is tangent. The other letters tell you what to use to find them. O is opposite A is adjacent and H is hypotoneuse. So the sine of B would be 2 sqrts of 6 (opposite) over 7(hypot.)
then to find cosine you would use 5(adjacent) over 7(hypot.)

would this still be the answer even though they were the same answers for angle A?

sin A = side opposite/hypotenuse = 5/7

sin B = side opposite/hypotenuse = 2(sqrt 6)/7

sin B and cos B will give the same answer for angle B. You can subtract angle B from 90o to obtain angle A or use sin A = a/c = 5/7

Angle A is angle A is angle A. =).
It matters little if you use sin, cos, tan, cot, or whatever, you will always get the same answers for angles A, B, and C as long as the sides don't change length.

I get the part you are saying but could you or someone help me with how to plug it in to a calculator and solve it? It'd help a bunch

  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Functions (Math)

    The point P(2, -5) is located on the terminal arm of an angle θ in standard position. a) Draw and label an appropriate diagram. Remember to label θ and all the sides of the triangle. b) Determine the exact values of the primary

  2. math

    Note: Enter your answer and show all the steps that you use to solve this problem in the space provided. A triangle has 2 congruent sides. The angle between the 2 congruent sides is labeled x. The angles opposite of the 2

  3. Geometry

    A piece of art is in the shape of an equilateral triangle with sides of 21 in. What is the area of the piece of art to the nearest tenth? 311.8 in.^2 381.9 in.^2 155.9 in.^2 191.0 in.^2 Please help?

  4. math

    Altitudes AD and BE of acute triangle ABC intersect at point H. If angle AHB = 123 degrees and angle BAH = 26 degrees, then what is angle HCA in degrees? Asymptote code below [asy] size(150); defaultpen(linewidth(0.8)); pair B =

  1. Math

    The real numbers $a$ and $b$ satisfy $|a| < 1$ and $|b| < 1.$ (a) In a grid that extends infinitely, the first row contains the numbers $1,$ $a,$ $a^2,$ $\dots.$ The second row contains the numbers $b,$ $ab,$ $a^2 b,$ $\dots.$ In

  2. Maths

    Draw and label a figure to represent the congruent triangle. Then find X and Y. Triangle YXZ congruent triangle CAB, m

  3. Math

    On a centimeter dot array, draw all possible rectangles with a perimeter of 12 cm and sides whose lengths are whole centimeters. Label the lengths of two adjacent sides of each rectangle.

  4. Math

    Each letter of alphabet is written on a separate piece of paper and placed in a box and then one piece is drawn at random. . What is the probability that the selected piece of paper has a vowel written on it?

  1. Math

    A quarter-circle with radius $5$ is drawn. A circle is drawn inside the sector, which is tangent to the sides of the sector, as shown. Find the radius of the inscribed circle. The rest is in asymptote size( 100 ) ; // Not to

  2. Math

    In the figure, what is the area of triangle $ABD$? Express your answer as a common fraction. [asy] draw((3,0)--(0,0)--(0,4)--(7,0)--(3,0)--(0,4)); draw((0,2)--(7,0)); draw((.5,0)--(.5,.5)--(0,.5)); label("$A$",(0,4),W);

  3. Maths

    a rectangular piece of paper has length=14cm and breadth=12cm. A square piece of paper of perimeter 24 cm is cut off from it. what is the area of the piece of paper left

  4. geometry

    on a centimeter dot array draw all possible rectangles with a perimeter of 22 cm and sides whose lengths are whole centimeters label the lengths of 2 adjacent sides of each rectangle

You can view more similar questions or ask a new question.